CVE-2021-21986

CVSS 3.1: 9.8 critical
EPSS: 13%p96
Published: May 26, 2021 · May 26, 2021
Modified: Jun 17, 2026

Analyze CVE-2021-21986 with Vani AIImpact, affected versions, exploitation status, mitigations and detection

Description · NVD

The vSphere Client (HTML5) contains a vulnerability in a vSphere authentication mechanism for the Virtual SAN Health Check, Site Recovery, vSphere Lifecycle Manager, and VMware Cloud Director Availability plug-ins. A malicious actor with network access to port 443 on vCenter Server may perform actions allowed by the impacted plug-ins without authentication.

Vendors: vmware

Products: vcenter server, cloud foundation

Weakness: CWE-306

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

NVD CVE.org GitHub PoCs EPSS (12.9%)

In the news

4 stories

VMware fixes critical vCenter Server RCE vulnerability, urges immediate action (CVE-2021-21985)

Help Net SecurityDec 13, 14:47 UTC · Dec 13, 2023VulnerabilityCVE-2021-21985 CVE-2021-219863 · 1 read

Week in review: VMware critical updates, prevalent enterprise cybersecurity risks, 3 years of GDPR

Help Net SecurityMay 30, 00:00 UTC · May 30, 2021Policy & legalCVE-2021-21985 CVE-2021-21986 CVE-2021-307134 · 1 read

Another critical bug impacts all VMware vCenter Server installs

Security AffairsMay 26, 10:08 UTC · May 26, 2021VulnerabilityCVE-2021-21985 CVE-2021-21972 CVE-2021-219866 · 3 reads

Critical RCE Vulnerability Found in VMware vCenter Server — Patch Now!

The Hacker NewsMay 26, 04:57 UTC · May 26, 2021VulnerabilityCVE-2021-21985 CVE-2021-21986 CVE-2021-21972+13